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Unreal Engine 4 AI Programming Essentials

You're reading from   Unreal Engine 4 AI Programming Essentials Create responsive and intelligent game AI using Blueprints in Unreal Engine 4

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Product type Paperback
Published in Mar 2016
Publisher
ISBN-13 9781784393120
Length 188 pages
Edition 1st Edition
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Authors (2):
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Jie Feng Jie Feng
Author Profile Icon Jie Feng
Jie Feng
Peter Newton Peter Newton
Author Profile Icon Peter Newton
Peter Newton
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Toc

Table of Contents (11) Chapters Close

Preface 1. Introduction to Game AI 2. Creating Basic AI FREE CHAPTER 3. Adding Randomness and Probability 4. Introducing Movement 5. Giving AI Choices 6. How Does Our AI Sense? 7. More Advanced Movement 8. Creating Patrol, Chase, and Attack AI 9. What Have We Learned? Index

Resetting the state


Now, this next part will allow us to use our ChaseTime Float variable in a Retriggerable Delay node. Basically, when they're in the line of sight, the Retriggerable Delay node will continue to be reset. Once we lose the line of sight, the other execution path will execute DoOnce, attempting to reset our AI's State variable. Once the Retriggerable Delay node finishes delaying by the designated Chase Time value, it will reset DoOnce, allowing our bot to reset its state. Perform the following steps:

  1. Now let's look at the Branch node we just created and pull from False and create a new DoOnce node. We can leave Start Closed as default.

  2. If we track back to True from the previous Branch node, we can pull from True then create a Sequence node.

  3. Pull from the first Then 0 exec pin and create a Retriggerable Delay node. Next, let's plug in our Chase Time variable into the Duration variable. Lastly, let's plug in Completed into the Reset input execution of the DoOnce node we created...

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